This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A177444 #5 Feb 08 2022 22:42:27
%S A177444 1,1,0,0,1,0,1,1,0,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1,1,0,0,
%T A177444 0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0
%N A177444 Triangle by columns, (1, 1, 0, 1, 0, 0, 0, ...); shifted down twice for columns > 0.
%C A177444 Let the triangle = M. Limit_{n->infinity} M^n = A120562, the left-shifted vector
%C A177444 considered as a sequence.
%F A177444 As an infinite lower triangular matrix, (1, 1, 0, 1, 0, 0, 0, ...) in every
%F A177444 column, prefaced with k zeros.
%e A177444 First few rows of the triangle:
%e A177444 1;
%e A177444 1, 0;
%e A177444 0, 1, 0;
%e A177444 1, 1, 0, 0;
%e A177444 0, 0, 1, 0, 0;
%e A177444 0, 1, 1, 0, 0, 0;
%e A177444 0, 0, 0, 1, 0, 0, 0;
%e A177444 0, 0, 1, 1, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 1, 0, 0, 0, 0;
%e A177444 0, 0, 0, 1, 1, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0;
%e A177444 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0;
%e A177444 ...
%Y A177444 Cf. A120562, A177445.
%K A177444 nonn,tabl
%O A177444 0,1
%A A177444 _Gary W. Adamson_, May 08 2010